Nacho Cheese Sandwich

Ingredients

• 1/3 cup roma tomato, seeded and chopped
• 1/4 cup green onion, finely chopped
• 1 lb lean ground beef
• 1 tablespoon taco seasoning mix
• 1/4 cup pickled jalapeno pepper, finely chopped
• 8 slices bread (thick)
• 1 1/2 tablespoons light sour cream (or as needed)
• 2 cups sharp cheddar cheese, grated
• 1 teaspoon hot sauce (or to taste)
• 1 avocado, peeled, pitted and cut into small pieces
• 1 cup monterey jack pepper cheese, grated
• 1/4 cup salsa
• 2 tablespoons cilantro, chopped
• 1 1/2 tablespoons butter, spread (or as needed)