In bowl toss together salmon, cornstarch, salt, and black pepper; set aside.
Coat a large nonstick skillet with cooking spray. Heat skillet over medium-high heat. In hot skillet cook and stir onion, sweet pepper, carrots, ginger, garlic, curry powder, and, if desired, crushed red pepper for 5 to 6 minutes or until vegetables are crisp-tender. Remove from skillet; set aside.
Add oil to skillet. Cook seasoned salmon in hot oil about 4 minutes or until fish flakes easily; occasionally stir gently. Stir in undrained pineapple and coconut milk. Reduce heat. Cook, uncovered, 1 minute or until thickened; stir gently. Stir vegetables into skillet; heat. Serve with rice. Makes 4 servings.