Garlicky Roasted Vegetables Recipe

1 small head broccoli

cut into florets

1 medium red onion

quartered

1 medium red potato

thinly sliced

1 small red bell pepper

sliced

1 small orange bell pepper

sliced

8 each fresh green beans

halved

3 sprouts Brussels sprouts

cut into thirds

2 medium fresh mushrooms

sliced

5 cloves garlic

peeled

1 teaspoon ground black pepper

½ teaspoon salt

or to taste

⅛ teaspoon fresh lemon juice

3 tablespoons olive oil

or to taste