In a large skillet, melt the butter over medium heat. Add the beef and begin to brown it. While the meat is cooking, bring a large pot of salted water to a boil (for the pasta).
1 Tablespoon butter, 1 pound lean ground beef
Add the zucchini, pepper, and onion. Sauté for 10-12 minutes or until most of the water has cooked off.
1 zucchini, shredded, 1 bell pepper, diced, 1/2 onion yellow or white onion, diced
Stir in the diced tomatoes, taco seasoning, and Worcestershire sauce. Reduce the heat to medium low. Add the pasta to the pot of boiling water and cook for one minute less than the shortest time suggested on the back of the package.
1 10-ounce can diced tomatoes and green chiles, 3-4 Tablespoons taco seasoning*, 2 Tablespoons Worcestershire, 8 ounces pasta*
While the pasta cooks, add the half and half and cream cheese to the meat mixture. Stir continuously until the cream cheese has melted.
2 cups half and half, 4 ounces full-fat brick style cream cheese
Turn the heat off. Stir in about 1.5 cups of the cheese, saving some for topping.
4 ounces (1 cup) sharp cheddar, shredded, 4 ounces (1 cup) pepper jack, shredded
Once the pasta is done, strain it and fold it into the meat sauce.
Transfer to a lightly greased baking dish. Sprinkle the remaining cheese on top.
Bake for 10-15 minutes and broil if desired.