Breakfast Egg Muffins

bacon (cut into 1/2" pieces)

small onion (1/2 cup finely chopped)

large or 2 small russet potatoes (peeled)

fresh baby spinach (2 cups, coarsely chopped)

mild cheddar cheese ((1 1/2 cup shredded), divided)

large eggs

half and half (or equal parts whipping cream and milk)

Tabasco sauce