Make a nutritious lunch by spooning this chunky hummuslike spread into whole-wheat pita halves and layering with tomato slices. Or, for a cocktail-hour snack, dab a small amount on cherry-tomato halves.
Heat oil in a large stockpot over medium heat. Add garlic. Cook, stirring, until fragrant, about 1 minute. Add chickpeas and 1 tablespoon lemon juice. Cook, stirring, 1 minute. Add spinach, 1/4 teaspoon salt, and the red-pepper flakes. Cover; raise heat to medium-high. Cook, stirring once, until spinach has wilted, about 4 minutes. Uncover; raise heat to high. Cook, stirring, until most of the liquid has evaporated, about 2 minutes. Let cool.
Pulse spinach mixture, tahini paste, remaining teaspoon lemon juice, and 1/4 teaspoon salt in a food processor until slightly chunky.
Spread can be refrigerated in an airtight container, up to 2 days.