Cook green beans in boiling water 1 minute. Add broccoli and asparagus; cook 2 minutes or until vegetables are crisp-tender. Remove vegetables from pan with a slotted spoon; place in a large bowl. Return water to a boil. Add pasta; cook 10 minutes or until al dente. Drain and add to vegetable mixture.
Heat oil in a large nonstick skillet over medium-high heat. Add 1 cup onion, and sauté for 2 minutes. Add garlic and red pepper; sauté 3 minutes or until onion begins to brown. Add peas, and sauté 1 minute. Add tomatoes; sauté 2 minutes. Combine half-and-half and cornstarch, stirring with a whisk. Reduce heat to medium. Add half-and-half mixture and salt to pan; cook 1 minute or until sauce thickens, stirring constantly. Pour sauce over pasta mixture; toss gently to coat. Sprinkle with basil and cheese. Serve immediately.
Wine note: Pasta Primavera is a burst of spring. The wine that accompanies it should be, too. Sauvignon blanc is a good option since the fresh "green" quality mirrors vegetables perfectly. But because this is a cream-based pasta primavera, I would opt instead for a pinot blanc. Rounder and more mellow than sauvignon blanc, pinot blanc at its best soars with freshness and vivacity, and is loaded with floral and citrus character. My favorite: Robert Sinskey Pinot Blanc 2005 Los Carneros, California ($18). --Karen MacNeil