Quinoa Salad with Grilled Vegetables and Feta

INGREDIENTS

• 3/4 cup olive oil
• 2 cups quinoa
• 3 1/2 cups water or vegetable stock
• Kosher salt, to taste
• 1 red onion, cut into 1/4-inch rounds
• 2 zucchini, cut lengthwise into 1/4-inch slices
• 2 summer squashes, cut lengthwise into 1/4-inch slices
• Freshly ground pepper, to taste
• 1 pint grape tomatoes, halved
• 1/4 cup fresh lemon juice
• 1/3 cup fresh basil leaves, larger leaves torn
• 1/3 cup fresh mint leaves, larger leaves torn
• 4 oz. feta cheese, crumbled