Sliced spinach quiche on a wooden serving plate - Alleko/Getty Images With a buttery, flaky pastry base and a rich, savory filling, quiche strikes the perfect balance between elegance and heartiness.

Preheat oven to 350 degrees. Coat a large ceramic fluted quiche dish or glass pie dish with cooking spray. Heat olive oil (or cooking spray) in a large nonstick skillet over medium-high heat. Sauté ...