Toast the Walnuts
Place walnuts in a dry skillet over medium heat.
Toast for 3–4 minutes until fragrant.
Remove and set aside.
Cook the Aromatics
Heat olive oil in a skillet over medium heat.
Add shallot and sauté for 2–3 minutes until softened.
Add garlic and cook 30 seconds.
Cook the Mushrooms
Add finely chopped mushrooms to the skillet.
Cook 8–10 minutes until moisture evaporates and mushrooms brown.
Stir in soy sauce, thyme, salt, and pepper.
Cook another 1–2 minutes.
Remove from heat and allow to cool slightly.
Blend the Pâté
Add mushroom mixture and toasted walnuts to a food processor.
Blend until smooth and creamy but thick.
Taste and adjust seasoning.
Spoon into ramekins or a small serving dish.
Smooth the top and refrigerate while preparing jelly.
Prepare the Balsamic Jelly
In a small saucepan, whisk balsamic vinegar, water, maple syrup, and agar-agar.
Bring to a gentle boil, stirring continuously.
Simmer 2–3 minutes to activate agar.
Remove from heat and cool for about 5 minutes (not fully set).
Add Jelly Layer
Carefully pour balsamic mixture over chilled pâté.
Return to refrigerator.
Chill at least 1 hour until fully set.
Serve
Serve chilled or slightly cool with crackers, crostini, or toasted baguette slices.