Instructions
Obtain the ingredients needed for the first Chef's recipe -- sardines and limes.
Catch sardines by using your spear in the ocean.
Obtain limes by planting a lime seed and growing a lime tree. Talk to Ms. Weeder to get a lime seed. You must plant the lime seed using a shovel and water it for several days. Once the limes have grown, click the lime tree to harvest them.
Return to the chef and swap the sardines and limes for a knife.
Cut down long grass using the knife. With the knife equipped, click on a patch of long grass and choose the "Cut" option to do this.