Sautéed Greens with Toasted Walnuts

Directions

1. 1.

   Heat a large skillet over medium and toast walnuts, shaking pan often, until fragrant, about 5 minutes. Transfer nuts to a plate.

2. 2.

   Heat same skillet over medium and add oil and butter, stirring to combine. Once butter melts, add onion, 1/4 tsp. salt, and 1/4 tsp. pepper and cook, stirring occasionally, until softened and translucent, about 5 minutes. Add Swiss chard stems and cook, stirring occasionally, until softened, about 2 minutes more. Add garlic and red pepper flakes and cook, stirring constantly, until fragrant, 1 minute. Add Swiss chard greens, beet greens, vinegar, remaining 1 tsp. salt, and remaining 1/4 tsp. pepper. Cover and cook, stirring occasionally with tongs, until tender, about 3–4 minutes. Uncover and cook 1 minute more. Serve topped with toasted walnuts.