Step 1

Preheat grill to medium-high.

Step 2

Combine 1 cup strawberries, vinegar and 1/4 teaspoon each salt and pepper in a blender. Blend until smooth. With the motor running, slowly drizzle in oil. Transfer 1/2 cup of the vinaigrette to a large bowl. Add ketchup and preserves to the blender and pulse until smooth.

Step 3

Sprinkle chicken with the remaining 1/8 teaspoon salt and 1/4 teaspoon pepper. Oil the grill rack. Grill the chicken until it releases easily, 1 to 2 minutes. Flip and baste with the BBQ sauce from the blender. Cook, flipping and basting every 15 seconds, until an instant-read thermometer inserted in the thickest part registers 165 degrees F, 3 to 4 minutes more. Transfer to a plate and let rest for 5 minutes.

Step 4

Add spinach, almonds, feta, basil and the remaining 1 cup strawberries to the vinaigrette; toss to combine. Serve the salad topped with the chicken.