How to Make a Spinach Mushroom Frittata?

Ingredients

• 4 ounces Canadian bacon, diced
• 1 clove garlic, finely minced
• 1-2 tablespoons red onion, diced
• 1/2 cup baby bella mushrooms, sliced
• 1/4 cup Sun-dried tomatoes, finely chopped
• 1 cup cooked spinach, chopped (okay to use frozen chopped spinach)
• 5 eggs, well beaten
• 3/4 cup Fat-Free milk (or milk substitute)
• 1 tablespoon avocado oil (or other cooking oil)