Charred green beans are tossed with lemon, dijon mustard, and shallots. Walnut oil and chopped walnuts provide extra flavor and texture!
In a small bowl, whisk together mustard, lemon juice, lemon zest, and shallot. Set aside.
Heat a large sauté pan over medium heat. Add butter, 1 tablespoon walnut oil, and all green beans. Toss only occasionally so that green beans get some char marks. After 4 minutes, add in salt, pepper, and garlic. Stir occasionally and cook for another 5 minutes, reducing heat slightly if necessary so garlic doesn't burn.
Taste a green bean to see if it's thoroughly cooked. Then, turn off heat and add in lemon/mustard sauce and chopped walnuts, tossing together. If desired, drizzle with more walnut oil immediately before serving. Enjoy!