Simple Mushroom, Spinach and Tomato Frittata | What you eat

Ingredients

• 1 Tbsp (15 mL) butter
• 3 cups (750 mL) sliced cremini mushrooms
• 8 eggs
• 1 cup (250 mL) Greek yogurt
• 1/2 tsp (2 mL) each salt and fresh ground pepper
• 1 cup (250 mL) grated Swiss cheese, divided
• 3 cups (750 mL) baby spinach
• 1 cup (250 mL) grape or cherry tomatoes, halved