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Granola - Oats on oats? Why not? They're crunchy and delicious.

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Sautéed greens - A great way to use leftovers and pack your oatmeal with nutrient-dense ingredients.

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Peanut butter - A spoon of peanut butter makes your oatmeal deliciously nutty and gooey.

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Caramelized apples - Imagine having a warm bowl of oatmeal with these on a cold winter morning.

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Matcha powder - Low in calories and rich in antioxidants, matcha powder will give your oatmeal a distinctive flavor. 

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Salsa - Spicy savory oats, anyone? Well, here's an unusual, yet tasty, combo.

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Chai tea - Just open a tea bag and mix it into your oatmeal. The blend of black tea, cloves, ginger, cardamom, and cinnamon, will give your oats a warm flavor.

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Banana slices - A few banana slices are enough to make your oatmeal taste sweet. Don't need a whole banana? Freeze the rest and you can use it next time.

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Grated zucchini - Add some green sweetness to your oatmeal. Grated carrots are also a good alternative.

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Chia seeds - Stir them into your oatmeal instead of sprinkling them on top. This way, the seeds will thicken the meal.

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Almond extract - If you're just looking to add a bit of flavor, almond extract is a great option that will give your oats a nutty flavor.

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Soy milk - An alternative to dairy. Unsweetened vanilla soy milk is a great option.

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Honey - Drizzling some honey on top of your oatmeal will give it all the sweetness you need.

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Fruit spread - Pick your favorite flavor and add it to your oats. Go for the 100% fruit ones, without any additives such as sugar or artificial sweeteners.

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Caramelized bananas - For a more decadent touch, add a few sauteed bananas to your oats. 

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Dried cherries - Many people use raisins, but cherries can also be a great oatmeal topping.

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Almonds - With skin on or blanched, the choice is yours. Almonds pack a good amount of protein and healthy fats.

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Hemp seeds - Naturally high in protein, hemp seeds can be a nice little extra on top of your oats.

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Dried pineapple - Add a tropical touch to your oatmeal with dried pineapple.

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Pomegranate seeds -

Biting these are fun on their own. Add them to oatmeal and enjoy the mix of flavors.

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Butternut squash/pumpkin - Canned versions work best, but you can cook some and freeze it.

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Dark chocolate -

Indulge without the guilt. A few shavings of dark chocolate on your oatmeal will taste amazing.

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Sunflower seeds -

Add hulled sunflower seeds to your oatmeal. Choose unsalted and dry-roasted versions.

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Frozen berries - Pop them into the microwave for a bit and you'll get sweet, juicy berries on your warm oats.

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Pistachios - Buy a bag of shelled unsalted pistachios and add a bit of nutty crunch to your oatmeal.

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Walnuts - You can cut them in half of chop them, so they'll become easier to mix.

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Egg - If you're more into savory oats, eggs can work great!

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Diced pears - Keep the skin on for some extra antioxidants and vitamin C.

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Pumpkin pie spice - You might not find this in every supermarket if you don't live in North America, but if you can buy it, it's definitely worth a try.

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Coconut flakes -

A classic that also goes really well with oats.

See also: Healthy yogurt combo ideas for a better breakfast

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