Combine cooked quinoa, bell pepper, flaxseed, salt, pepper, and egg in medium bowl; mix well. Form two balls. Place one ball in a flat 1-cup measure. Press into a patty using flat ½ cup measure. Turn 1-cup measure over to release patty. Repeat with other ball.
Heat medium skillet lightly coated with olive oil over medium heat.
Place patties in skillet; cook for four minutes. Turn and cook for four minutes or until light golden. Remove from skillet. Keep warm.
Add spinach to skillet; cook, stirring frequently until wilted.
(for more flavor, saute with minced shallots, olive oil and a squirt of lemon)
Place spinach on serving plate and top with patties.