In a large skillet over medium heat, saute the squash and in zucchini in the olive oil until almost tender, about 3 - 4 minutes. Season with salt and pepper.
Add quinoa to the skillet and cook for another minute or so until everything is warm.
Whisk together the lemon juice, zest, dill and red pepper flakes in a small bowl.
Either transfer this mixture to a bowl or leave in the skillet and add the dressing and pine nuts. Toss to combine, taste and adjust salt and pepper as needed.