melt butter in 1 quart saucepan over medium-low heat.

stir in garlic and cook until golden, about 1 minute

stir in lemon juice, lemon peel, pepper, and broth combined with cornstarch.

bring to a boil over medium-high heat, stirring frequently until sauce thickens.

pour sauce over hot cooked broccoli and garnish if desired with lemon wedges.