In a small bowl, whisk together the tamari, honey, rice vinegar, toasted sesame oil, grated ginger, minced garlic, and red pepper flakes.
Pat the salmon fillet dry with a paper towel to ensure a crisp sear.
Heat the avocado oil in a large skillet over medium-high heat until shimmering.
Place the salmon in the skillet skin-side up and cook for 4 minutes until a golden crust forms.
Flip the salmon and add the green beans to the skillet, arranging them around the fish.
Pour the prepared sauce over the salmon and green beans, then reduce heat to medium.
Simmer for 3 minutes, tossing the beans occasionally, until the glaze is thick and the salmon is cooked through.
Transfer to a plate and garnish with sesame seeds and sliced green onions.