Cook pasta according to package directions; drain.
Meanwhile, in a medium skillet, brown sausage meat over medium heat.
Remove to a bowl with a slotted spoon; set aside.
Add mushrooms to the drippings in skillet. Cook 3 to 4 minutes, or until lightly browned. Sprinkle Worcestershire's sauce over the mushrooms, then stir in evaporated milk. Bring to a simmer. Add basil and pepper. Simmer 3 to 4 minutes, or until slightly thickened. Add peas and cooked sausage. Cook 1 to 2 minutes, or until hot.
To serve, in a large bowl, toss pasta with sauce and Parmesan cheese. Garnish with cherry tomatoes.