How to Grow Cucumbers and Tomatoes from Seeds
Get the seeds
Cucumber Seeds and Tomato Seeds are the two crop seeds. Obtain them from your world's loot or by processing the relevant produce, then plant them on farmland like any other crop.
Plant and grow
Place Cucumber Seeds and Tomato Seeds on hydrated farmland with light. Let them mature through their growth stages. Once fully grown, harvest the cucumbers and tomatoes. Replant the seeds to keep a continuous supply.
Prepare them for sandwiches
Raw cucumbers and tomatoes need processing before they go on a sandwich. Take them to a Cutting Board with a Kitchen Knife — Stone, Glass, Iron, Golden, Diamond, or Netherite Kitchen Knife — and chop them. Cook the chopped results to get Cooked Tomato Slice and other cooked chopped vegetables such as Cooked Chopped Carrot, Cooked Chopped Onion, and Cooked Chopped Beetroot. Bring the finished items to a Sandwich Table and add them as fillings alongside Salt, Mayonnaise Bottle, or a Cheese Culture Bottle product. Keep a small farm near your kitchen so you always have fresh produce for chopping.