Preheat your oven to 425°F. Line a baking sheet with parchment paper.
In a small bowl, mix the lemon juice, minced garlic, and 1 teaspoon of olive oil. Set aside.
Place the chicken breast on a cutting board. Pat dry with paper towels. Brush the lemon garlic mixture evenly over the chicken.
Lightly season the chicken with salt and pepper if desired.
Cut the sweet potato into 1/2-inch thick rounds or wedges. Toss with the remaining olive oil, salt, and pepper.
Arrange the seasoned sweet potato pieces on the prepared baking sheet and roast in the oven for about 20-25 minutes until tender and slightly crispy.
While the potatoes are roasting, heat a non-stick pan over medium-high heat. Cook the chicken breast for about 5-6 minutes on each side, or until the exterior is crispy and the internal temperature reaches 165°F.
In a serving bowl, add the fresh spinach. Once the chicken is cooked, slice it and place it atop the spinach. Add the roasted sweet potato on the side.
Serve immediately and enjoy the balance of crispy, tangy chicken with the sweetness of roasted potatoes and the refreshing crunch of spinach.