Heat a medium skillet over medium heat. Add the cumin and coriander seeds. Toast, shaking the pan, until the spices have browned and are fragrant. Transfer to a mortar and pestle or spice grinder to grind.

Dice the zucchini into ¼” cubes. Wipe out the skillet and return to medium to medium-high heat. Add the the olive oil to the pan followed by the zucchini. Cook, only stirring a few times, until the zucchini is almost browned and tender. Add the spices and continue to cook until the zucchini is browned.

Remove the zucchini from the heat and add the lemon juice and salt to taste. Store in an airtight container in the refrigerator and use within 4 or so days.