Snap off the woody ends of 2 bunches medium asparagus; discard. Slice the spears diagonally into 2-inch pieces. Heat 3 tablespoons olive oil in a skillet over medium heat; add the asparagus and cook until tender but still bright green, about 2 minutes. Season with salt and pepper. Remove from the heat and toss with the juice of 1 lemon. Top with 1/4 cup toasted sliced almonds, and lemon zest to taste.