Add kale and cook until wilted.
Add onions and cook until they caramelize slightly.
Add roasted sweet potatoes to the skillet.
Cook on the stovetop until edges are set.
In a bowl, whisk together eggs, milk, salt, and pepper.
In a skillet, heat olive oil over medium heat.
Let it cool slightly before slicing and serving.
Pour the egg mixture over the veggies.
Preheat the oven to 375°F (190°C).
Roast the sweet potatoes on a baking sheet with a bit of olive oil until tender, about 20 minutes.
Sprinkle cheese on top if using.
Transfer to the oven and bake for 10-15 minutes until fully set.
This Sweet Potato & Kale Frittata makes a delicious breakfast or brunch option. Enjoy with friends or family!