Add the chicken, garlic, rosemary, sage, and honey to a medium bowl. Add the olive oil, season with salt and pepper, and gently toss to combine. Put the chicken in the refrigerator and marinate for 3-5 hours or up to overnight. Remove the chicken from the refrigerator.
Prepare a grill to medium-high heat. Put the chicken on the grill, skin side down, and cook for approximately 8 minutes. Turn the chicken over and continue to cook for 9 minutes longer, or until they are cooked through. Remove from the grill.
In a medium cast-iron skillet, heat the olive oil over medium-low heat. Add the garlic and the chili peppers to the skillet and cook for 1 minute, stirring. Do not let the garlic brown. Add the mushrooms to the skillet and increase the heat to medium-high. Season with salt and pepper, and cook for 10 minutes, or until softened, stirring. Remove from the heat.
Transfer the chicken to individual plates and serve with the mushrooms on the side. Serve immediately.