In a 3-quart casserole combine cauliflower, green or sweet red pepper, onion, and º cup of the broth. Cook, covered, on 100% power (high) for 7 to 9 minutes (9 to 11 minutes in low-wattage ovens) or till cauliflower is tender, stirring once.
Combine remaining chicken broth and the cornstarch. Stir into cauliflower mixture. Cook on high for 2 to 3 minutes (3 to 4 minutes in low-wattage ovens) or till thickened and bubbly, stirring every 30 seconds.
Stir in lemon juice. Cook on high for 1 minute more or till heated through. Sprinkle with almonds.