Toss the asparagus and almonds in 2 tablespoons of the olive oil. Lightly sprinkle with salt and place on a baking tray. Cook in a preheated oven at 400 F for 12 – 15 minutes. Remove from the oven and allow to cool. In a mixing bowl, combine the lemon juice, pepper and remaining olive oil and red onion. Add the mixed salad greens, olives, roasted peppers and cooled asparagus and gently toss together. Transfer to a serving dish, sprinkle with the feta cheese. Makes 4 servings.