20 common cooking mistakes that ruin your food or healthBy Nish Rathor / February 17, 2025 2. Onion beating If you want real, sweet, crisp-ridden onions to top your pizza, then cook them on high heat for less than a minute. They are likely to ruin your dish at any time. Source: Internet Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20