shrimp and roasted red pepper alfredo

Ingredients

• 12 ounces penne pasta
• 1/4 cup butter
• 2 tablespoons olive oil
• 1 - onion, diced
• 2 teaspoons garlic powder
• 1 - red bell pepper, roasted & diced
• 1/2 pound portobello mushrooms, diced
• 1 pound med shrimp, peeled & deveined
• 2 cups alfredo sauce (below)
• 1/2 cup grated romano cheese
• 1/2 cup light cream (or evaporated milk)
• 1 teaspoon cayenne pepper, more or less to taste
• 1/4 cup chopped fresh parsley
• - salt & pepper to taste
• ALFREDO SAUCE
• 1 cup milk
• 1 cup light cream (or evaporated milk)
• 3 tablespoons butter
• 2 tablespoons corn starch
• 1/2 cup Parmesan cheese
• 1/2 teaspoon garlic powder
• 1/2 teaspoon pepper