01 - Wash the greens thoroughly and drain well.
02 - Heat olive oil in a large skillet over medium heat.
03 - Add sliced garlic and sauté for 1 minute, stirring frequently until fragrant but not browned.
04 - Add greens to the skillet, tossing to coat with oil and garlic. Cook, stirring often, for 4 to 6 minutes until wilted, tender, and bright green.
05 - Season with salt, pepper, and red pepper flakes if desired. Stir in lemon zest and juice, toss to combine, and cook for 1 additional minute.
06 - Taste and adjust seasoning as needed. Transfer to a serving dish and sprinkle with toasted nuts if using. Serve warm.