Maryanne's Pasta Primavera

INGREDIENTS

• 1 (8 ounce) package angel hair pasta
• 1 cup water
• 1 cube vegetable bouillon
• 1/4 teaspoon dried tarragon
• 1/4 teaspoon crushed red pepper flakes
• 1/4 teaspoon dried oregano
• 2 cups Brussels sprouts, halved
• 1/2 cup green beans
• 1 cup peeled and diced potatoes
• 1 cup peeled and sliced carrots
• 1/2 cup minced onion
• 2 tablespoons water
• 1 (8 ounce) container sour cream
• 2 tablespoons cornstarch
• 2 tablespoons grated Parmesan cheese
• salt and pepper to taste