Coffee Mug Breakfast Sandwiches

Ingredients (7)

• 1 English muffin, toasted
• 1 large egg, scrambled
• 2 tablespoons cheddar cheese, grated
• 1 teaspoon butter
• Salt and pepper
• 1 strip cooked bacon, crumbled (opt.)
• 1 tablespoon red onion, minced (opt.)