Identify what anchovy is doing in your recipe: pure umami (sauce), briny saltiness (salad/dressing), or melt-in background flavor (cooked sauces).
Start with the closest pick from the table (aim for the listed ratio) and add it gradually—especially if it’s concentrated (paste/powder/soy).
If your substitute tastes too sharp or flat, blend in a small amount of olive oil (for roundness) and a drop of lemon/vinegar (for anchovy-like brightness).
If it tastes too salty, stretch the dish with an unsalted base (more tomatoes, more cream, or extra vegetables) instead of adding more liquid.
Taste again after a short rest (5 minutes) because savory flavors blend and mellow as the dish sits.