Preheat the oven to 450° F.On a baking sheet, mix the chicken with the balsamic vinegar, honey, shallots, garlic, thyme, and oregano. Season with salt, pepper, and chili flakes. Arrange the chicken in an even layer. Arrange the asparagus over the chicken, add slices of butter on top, and season with salt and pepper. Bake 15-20 minutes, until the asparagus is cooked. Switch the oven to broil. Remove the asparagus from the pan. Broil the chicken and lemons until the chicken caramelizes, 1-2 minutes. Watch closely, the sauce can burn quickly. Remove the lemons from the sheet pan and finely chop 2 or 3 of the wedges. In a bowl, toss the chopped lemon with the feta, pine nuts, and herbs. Serve the chicken and asparagus over bowls of rice or pasta. Top with lots of feta.