Fajita Stuffed Spaghetti Squash

Name: Fajita-Stuffed Spaghetti Squash
Ingredients: 1 medium spaghetti squash (2 to 2 1/2 lb); 1 teaspoon vegetable or olive oil; 1/4 teaspoon salt; 1/8 teaspoon ground black pepper; 1/2 lb extra-lean ground beef (at least 90% lean); 1 medium serrano chile, seeded and finely chopped (about 2 teaspoons); 1 teaspoon finely chopped garlic; 3/4 cup sliced red, yellow or orange bell pepper; 3/4 cup sliced onions; 1 package (1 oz) Old El Paso™ original taco seasoning mix; 2/3 cup water; 3/4 cup shredded Cheddar cheese (3 oz); 1/2 cup chopped tomato; 1/2 cup diced avocado