Snap off tough ends of asparagus. Cook asparagus in boiling salted water to cover in a large skillet 3 minutes or until crisp-tender; drain.
Plunge asparagus into ice water to stop the cooking process; drain.
Melt butter in a large skillet over medium heat; add almonds, and sauté 2 to 3 minutes or until golden brown. Add asparagus and red bell pepper; cook 3 to 5 minutes. Toss with lemon juice, salt, and pepper, and serve immediately.