Garlic-Feta Roasted Butternut Squash with Chicken

2 pounds cubed butternut squash

2 large skinless

boneless chicken breasts

thinly sliced

1 large sweet red onion

or to taste

finely chopped

1 cup Mediterranean-style (with basil

Kalamata olive

and sun-dried tomato) crumbled feta cheese

2 tablespoons extra-virgin olive oil

2 cloves garlic

or to taste

minced

1 pinch ground multi-colored peppercorns

or to taste

1 pinch sea salt

or to taste