Wash and dry the fresh produce. (Skip the arugula if it came pre-washed.)
1 lb cremini mushrooms
1 lemon
1 (5 oz) pkg baby arugula
Peel and small dice onion; peel and mince garlic. Transfer both to a medium bowl.
1 medium yellow onion
2 cloves garlic
Thinly slice the mushrooms.
Preheat a large ovenproof skillet over medium heat.
Once the skillet is hot, add oil and swirl to coat the bottom.
2 tbsp extra virgin olive oil
Add onion and garlic to the skillet and cook, stirring occasionally, until softened, about 4 minutes. Reserve bowl for later.
Increase heat to medium-high and add mushrooms; season with salt and thyme. Cook, stirring occasionally, until mushrooms are softened and liquid has evaporated, about 8-10 minutes.
½ tsp salt
½ tsp thyme
Meanwhile, roughly grate the cheese.
1 (8 oz) block mozzarella cheese
Combine eggs, half the cheese, salt, and pepper in the reserved bowl; whisk to combine.
12 eggs
½ tsp salt
⅛ tsp black pepper
Preheat oven to broil on high.
Spread the mushrooms evenly in the skillet. Reduce heat to medium-low and pour in the egg mixture. As eggs set around the edge of the skillet, gently lift cooked portions with a spatula to allow uncooked egg to flow underneath. Cook until bottom and sides are firm but the top is still runny, 5-7 minutes.
Sprinkle remaining cheese over the frittata. Place skillet in the oven until the top is set, 2-3 minutes.
Meanwhile, juice the lemon into a medium salad bowl. Add oil, maple syrup, salt, and pepper; whisk to combine the dressing. Add arugula and toss to combine the salad.
2 tbsp extra virgin olive oil
2 tsp pure maple syrup
½ tsp salt
¼ tsp black pepper
To serve, cut frittata into wedges and place on plates; top with arugula and enjoy!