Save at least 1 cup of starchy pasta water before draining—this is essential for achieving a silky, emulsified sauce that clings to the tortellini and helps balance the cream's richness.

Cook pancetta over medium heat rather than high to allow the fat to render gradually, creating crispy, flavorful pieces that won't burn while infusing the oil with deep, savory depth.

After removing pancetta, sauté fresh minced garlic and diced onion in the rendered fat before adding cream—this creates a more complex, rounded flavor than using powders alone.

Remove the pan from heat before stirring in the Asiago and Parmesan to prevent the cheese from becoming grainy or separating—the residual heat will melt them perfectly into a velvety sauce.

Stir in frozen peas during the last 2 minutes of cooking to preserve their bright color and slight firmness—adding them too early results in mushy, dull-looking peas.