Orange-Infused Roasted Green Beans & Red Peppers

1 lb. green beans, trimmed
1 red bell pepper, thinly sliced
1 Tbsp. extra-virgin olive oil
Zest of 1 orange
¼-1/2 tsp. crushed red pepper

Preheat oven to 450.  Toss green beans, bell pepper and oil in a large bowl.  Add orange zest and crushed red pepper to taste; toss to combine.  Spread on a large baking sheet.  Roast the vegetables, turning once halfway through cooking, until tender and slightly wilted, about 15 minutes.