Miso butter salmon is a great 4 ingredient main dish for one. The umami, salty, and sweet flavors in miso butter sauce pair well with salmon and vegetables. It's ready in 20 minutes and goes great over rice with vegetables, like cabbage.
Heat large skillet over medium heat. While preheating, prepare miso butter by adding butter, miso paste, and minced garlic to a small mixing bowl. Mix until incorporated. Set aside.
Add about ½ of the miso butter to hot pan. Place fish in center of heated pan, skin side down, if it's got skin. Add vegetables to pan, top with about ½ of remaining miso butter.