Preheat the oven to 400°F. and line a sheet pan with parchment paper, set aside.
Make the panade: combine the panko breadcrumbs and the half and half in a small bowl and soak for 5-10 minutes. The panko should be moist throughout, you can mash it all together after it soaks to make sure.
1/2 cup panko breadcrumbs, 1/4 cup half and half, milk, buttermilk, or heavy cream
Mix together the rest of the chicken meatball ingredients, along with the panko mixture, together in a large mixing bowl.
1 lb. ground chicken, 4 cloves garlic, minced or pressed with a garlic press, 1-2 Tbsp. olive oil, 1/2 cup freshly grated parmesan cheese, 1 egg, 1 tsp. Italian seasoning, 1 tsp. kosher salt, 1/2 tsp. onion powder, freshly ground black pepper
Careful not to over mix, I just use my hands or a wooden spoon until it all comes together.
Use a 2 Tbsp. cookie scoop to scoop into meatballs and place on prepared sheet pan, you should get ~18 meatballs.
Sprinkle the seasoned broccoli florets all around the meatballs.
3-4 cups broccoli florets
Bake for 15-20 minutes or until broccoli is roasted and chicken reaches an internal temperature of 165°F.
While the meatballs bake, you can make the pan sauce. Melt the butter in a skillet over medium heat and add the shallots. Saute for 2 minutes or until shallots become translucent, then add in the broth and lemon juice and turn the heat down to low and simmer for ~2-3 minutes.
4 Tbsp. unsalted butter, 2 Tbsp. finely minced shallots, 3/4 cup chicken broth (or white wine), 2 Tbsp. freshly squeezed lemon juice
Add the mustard, cream, thyme, salt and pepper. Stir. Allow to simmer again or ~5 minutes. It isn't a thick sauce, but it will thicken as it cools.
2 Tbsp. Dijon mustard, 2 Tbsp. heavy cream, 1 Tbsp. fresh thyme, parsley or sage, chopped, salt and pepper, to taste
Serve sauce over the meatballs and broccoli with your favorite pasta of choice, or rice, potatoes, etc.