Susans Spinach Omelet

Name: Susan's Spinach Omelet
Ingredients: 2 eggs, beaten; 2 Tbsp cream or milk; 1 dash(es) salt and pepper; 1 tsp olive oil, extra virgin; 2 Tbsp (or more) finely chopped green onions; 1 c baby spinach leaves, lightly packed; 1 dash(es) freshly grated nutmeg; 1/4 c sliced mushrooms, fresh or jarred (optional); 1 or 2 slice cooked bacon, crumbled (optional); 2-3 Tbsp grated cheese, such as muenster, swiss, or cheddar