In a large skillet over medium heat, melt butter, olive oil, and garlic together, stirring until all the butter is melted and bubbly. Slowly whisk in the chicken broth.
In a small measuring cup or bowl, whisk the corn starch slurry ingredients together until all of the corn starch is dissolved. Whisk the slurry into the large skillet, bring to a boil. Reduce heat and sauce will begin to thicken. Whisk in lemon juice, fresh grated parm, plenty of black pepper, and salt to taste.
Stir in drained and rinsed capers, and the All Purpose Chicken Meatballs. Simmer until meatballs are heated through. Serve alongside your favorite veggies, roasted potatoes, mashed potatoes, or pasta!
Meatballs can be frozen or thawed, they will just take longer to heat through from a frozen state. I often throw them in a bowl with a splash of water and microwave for a couple minutes to quicken the process.