Easy Spinach and Tomato Frittata

large eggs, lightly beaten

salt and pepper,

to 2 cups fresh spinach, loosely measured in cup

medium tomato, diced small (I used an unpeeled Roma)

optionally add extra produce (i.e. onions, mushrooms, zucchini, leftover sweet potatoes, etc.) and/or sprinkle with a handful of shredded cheese