Fill a large pot with water; peel potatoes, add to water and boil until fork tender. Drain; set aside, covered.
Meanwhile, cut chicken into 1/2-inch-thick strips.
Sprinkle chicken with salt and ground red pepper. Place flour in a shallow dish. Combine buttermilk and egg in a shallow dish, stirring well. Place coconut in a shallow dish. Dredge chicken in flour; shake off excess. Dip chicken in egg mixture; dredge in coconut.
Heat a large skillet over medium-high heat. Add oil to pan; swirl to coat. Add chicken to pan; cook 6 minutes or until done, flipping halfway to brown both sides.
Add milk and butter to potatoes and mash with a fork or potato masher until desired texture.
Slice strawberries, toss with spinach and dressing.