Rinse the red lentils thoroughly under cold water and place them in a small pot with 3/4 cup of water.
Bring the lentils to a boil, then reduce heat and simmer for 10 to 12 minutes until tender but still holding their shape, then drain any excess water.
Pat the salmon fillet dry with a paper towel and season both sides with a pinch of salt and black pepper.
Heat half of the olive oil in a non-stick skillet over medium-high heat.
Place the salmon in the pan skin-side down and sear for 4 to 5 minutes until the skin is crisp, then flip and cook for another 2 to 3 minutes until cooked through.
Remove the salmon from the pan and set aside to rest.
In the same skillet, add the remaining oil, minced garlic, and green beans.
Sauté the green beans for about 5 minutes until they are bright green and crisp-tender.
Plate the cooked lentils, top with the sautéed green beans, and finish with the seared salmon fillet.