Decadent Crawfish Mac and Cheese

Name: Decadent Crawfish Mac and Cheese
Prep time: 15 min
Cook time: 20 min
Total time: 35 min
Cuisine: American
Ingredients: 8 ounces pasta; 4 slices bacon; 2 green onions (sliced); 1 Tablespoon butter; 2 Tablespoons self-rising flour; 1 cup half and half; 1 teaspoon Cajun seasoning; 1 teaspoon salt; 1 quart water; 2 cups crawfish tails (cooked and shelled, fresh or frozen); 1 and ½ cup cheddar cheese (shredded ); 1 and ½ cup Monterey Jack cheese (shredded ); ¼ cup bread crumbs; 1 tablespoon butter