This Low Carb Keto Frittata is simple to make and incredibly tasty. In our house we like to prepare it at the start of the week and enjoy slices for breakfast throughout the week. The combination of peppers, onions, and fresh dill adds bright flavor, and the optional breakfast sausage on top is the perfect finishing touch. The recipe takes about 10 minutes to prepare, making it an excellent choice for busy mornings.
This frittata is a healthy, protein-rich way to start your day and keep you energized. If you like this, you might also enjoy other egg-based breakfast recipes.
Why You Will Love This Recipe
- Delicious and full of savory flavor—the sausage pairs beautifully with peppers, onions, and dill.
- Light yet satisfying, offering a balanced breakfast with vegetables and protein in one dish.
- Naturally low carb and compatible with keto, Whole30, paleo, gluten-free, grain-free, and dairy-free diets.
- Quick to prepare—ideal for weekday mornings and weekends alike. Make a batch to enjoy all week.
- You can easily make this vegetarian by omitting the sausage.
Ingredients
- Eggs – I prefer pasture-raised eggs for better flavor and nutrition.
- Peppers & onions – For texture and flavor. You can sauté them first if you prefer a milder, caramelized taste.
- Breakfast sausage – Optional; swap with bacon or turkey bacon, or omit for a vegetarian version.
- Dill – Adds a fresh, herbal note.
- Cooking oil spray – Prevents sticking; avocado oil spray or another neutral oil spray works well.
See the recipe card below for exact measurements and full instructions.
Substitutions and Variations
- Vegetables – Any vegetables you like will work; spinach, mushrooms, zucchini, or broccoli are great alternatives.
- Protein – Use bacon, turkey bacon, or cooked ham instead of sausage if you prefer.
- Cheese – If you eat dairy, crumbled feta or shredded cheddar can be added for extra richness.
- Vegetarian – Simply omit the meat or substitute with cooked plant-based sausage.
If you try other substitutions, feel free to leave a comment with your results.
Instructions
Equipment Needed
- Cast iron skillet or 9×9 casserole dish.
- Glass mixing bowl and whisk.
Expert Tips
- Whisk thoroughly: Beat the eggs well so the yolks are fully incorporated for an even texture.
- Saute for more flavor: If time allows, sauté the onions and peppers first to deepen their flavor.
- Optional broil: For a crisp top, broil the frittata for a minute or two at the end of baking—watch closely to prevent burning.
Recipe FAQs
Yes. Omit the sausage or replace it with a plant-based protein.
A quiche has a pastry crust; a frittata does not.
No. A casserole dish or other oven-safe pan works fine—just note that different pan sizes may change the baking time.
Storage and Reheating Instructions
- Refrigerate in an airtight container for up to 5 days.
- Reheat in the oven or air fryer at 350°F for 5–10 minutes for best texture.
- You can microwave leftovers, but reheating in the oven or air fryer yields better flavor and texture.
Keto Breakfast Items to Pair With
- Dairy-free hollandaise or other creamy sauce.
- Air-fried sausages or extra breakfast meat on the side.
Other Keto Egg Breakfast Recipes You Will Love
-
Spinach Mushroom Frittata
-
Pizza Egg Muffins (Keto, Paleo)
-
Keto Egg Muffins With Bacon
-
Prosciutto Egg Cups (Paleo, Keto)
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Keto Frittata
371kcal
Equipment
-
9 by 9 casserole dish or similar baking dish
Ingredients
- 12 eggs
- 2 peppers diced
- 1 onion chopped
- 1 tbsp dill
- 1 pound sausage links (optional) chopped; omit for vegetarian
- cooking oil spray
Instructions
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Preheat the oven to 400°F. Spray the casserole dish or skillet with cooking spray. Whisk the eggs until combined, then stir in the chopped peppers, onion, dill, and sausage if using.
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Pour the mixture into the prepared dish and bake for about 40 minutes, or until a fork inserted in the center comes out clean and there is no liquid remaining.