Grilled Chicken with Avocado-Citrus Sauce - serve 6

3 cloves garlic, finely chopped
1/2 cup unsalted butter, divided
1/2 cup whipping cream
1/2 tsp finely chopped orange zest
2 tbsp orange juice
1 tbsp lime juice
1 tbsp lemon juice
1 California avocado, pureed
1/4 tsp salt (+ as needed)
6 oz each boneless, skinless chicken breast halves
Black pepper
6 each lemon, lime, and orange slices

Sauté garlic in 1 tsp butter until soft but not colored, about 2 minutes. Stir in cream.
Heat to a simmer, stirring frequently; do not boil.
Stir in orange zest, juices, avocado, and 1/4 teaspoon salt. Keep warm.
Melt remaining butter. Brush chicken with butter. Season chicken with salt and pepper.
Bake at 450 degrees F until chicken is browned and just firm to the touch, about 15 minutes.