Heat olive oil in a pan over medium-high heat.

Once the oil is heated, add garlic and cook until fragrant, stirring constantly to avoid burning.

Add squash to pan and sprinkle with salt, pepper, and sugar. Stir together with garlic and cook until chayote softens slightly about 2 to 3 minutes.

Add vinegar to the pan and cook another 2 to 3 minutes or until the squash is even softer, but still has some firmness to it – reduce heat if chayote appears mushy.

Taste, adding sugar and other seasonings to your preferences. Remove from heat and enjoy!