Combine the lemon juice, oregano, garlic, and 2 teaspoons olive oil in a medium bowl. Whisk until well combined. Season with salt and pepper. {Alternatively, you can combine the ingredients in a jar, add the lid, and shake to combine.}
1/3 cup lemon juice, 2 Tablespoons Dijon mustard, 1 Tablespoon fresh oregano, 2 teaspoons olive oil, 1 garlic clove, salt and pepper to taste
Reserve ¼ cup of marinade. Pour the remaining marinade over the chicken breasts and marinate for 15-30 minutes.
4 boneless
Heat grill to medium-high heat. Lightly oil the grates of the grill. Remove chicken from the marinade, discard the marinade, and grill the chicken for 5-7 minutes per side or until chicken is cooked through.
Preheat the oven to 400 degrees. Toss grape tomatoes with 2 teaspoons of olive oil and place on a baking sheet. Roast in the oven for 10 minutes.
1 pint grape tomatoes, 2 teaspoons olive oil
In a large bowl, combine the quinoa, baby spinach and roasted tomatoes. Toss well and pour reserved 1/4 cup of marinade over salad mixture. Add to plates and top with sliced, cooked chicken.
2 cups baby spinach, 1 1/2 cups cooked quinoa