Soaking the cashews: Put the cashews in a bowl and pour boiling water over them. Let them soak for 15 minutes, then drain and rinse.
Preparing the mold: Line a mold or container with plastic wrap.
Blending: In a blender, blend the tofu, cashews, 50 ml of water, lemon juice, apple cider vinegar, olive oil, salt, garlic powder, onion powder, and nutritional yeast until smooth.
Preparing the agar-agar: In a saucepan, combine 240 ml of water and the agar-agar. Bring to a boil, then reduce heat and maintain a light boil for 1 minute, stirring constantly.
Combining with agar-agar: Immediately add the agar-agar mixture to the blend in the blender. Mix quickly until everything is well combined.
Pouring the mixture: Immediately pour the mixture into the prepared mold. Smooth the top if necessary.
Refrigeration: Let it cool to room temperature, then place in the refrigerator for at least 4 hours, or overnight, to firm up the feta.
Serving: Once firm, unmold the vegan feta. It can be cut into cubes or slices and used in salads, sandwiches, or as a cheese to enjoy. Sprinkle with freshly chopped herbs of your choice before serving for an additional taste.