Open and drain the canned five bean mix and chickpeas. Rinse them under cold water to remove excess sodium. Drain the jar of asparagus spears and cut them into thirds.
Chop the red onion and slice the capsicum thinly. In a large mixing bowl, combine the five bean mix, chickpeas, asparagus spears, chopped red onion, and sliced capsicum.
Drizzle the olive oil and vinegar over the salad mixture. Gently stir with a spoon or spatula to evenly distribute the dressing. Add salt and pepper according to your preference.
Give the salad another gentle mix to incorporate the seasoning. Cover the bowl with plastic wrap or a lid and chill the salad in the refrigerator for at least 1 hour.
Serve chilled as a side dish, or enjoy it on its own for a light and satisfying meal.