Preheat oven to 400°; wash zucchini, then slice into ¼-inch pieces; heat 1 tbsp oil in an oven-safe skillet over med-high, add zucchini to pan, season with salt/pep + sauté 3-4 min until tender

Thinly slice peppers + crumble half of feta; stir salt/pep + half of seasoning packet into 1 cup eggs; pour eggs over zucchini then top with peppers + feta; place skillet in oven + bake 8-10 min until eggs are just set

Sprinkle frittata with chopped parsley, slice + add to plates