Tabouleh...cans of chickpeas are cheap, likewise the fresh ingredients.

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Ingredients
US|METRIC
SERVINGS:
1 teaspoon lemon zest
1/4 cup lemon juice
1/4 cup olive oil
1/4 teaspoon black pepper (coarsely ground)
1 teaspoon salt
1/4 cup bulgur wheat
1/2 red onion (finely diced)
5 ounces parsley (I prefer flat-leaf, but curly works too)
2 cucumbers (Lebanese, about 5 ounces, cubed)
2 tomatoes (ripe, about 8 ounces, cubed)

It's really tasty in a fresh pita pocket too.