Ingredients :

• Avocados — They must be truly ripe — yielding under the thumb, but not black inside. If too firm, the mousse will be grainy. If too far gone, the taste turns bitter. Hass remains the best choice for its fatty and consistent flesh.
• Cream cheese (St Môret or Philadelphia) — It gives the mousse structure and prevents it from going watery. Avoid low-fat versions — they make it too liquid. Thick Greek yogurt can work in a pinch; the texture will be slightly less dense but very acceptable.
• Cooked peeled shrimp — Buy them already cooked and peeled; there’s no point in complicating life here. If they come from the freezer, let them thaw on paper towels — wiping them carefully before use prevents them from releasing water into the verrine and making everything soggy.
• Lime — It does two things at once: it seasons the mousse and slows down the avocado’s oxidation. Don’t skip the zest — that’s what gives that sharp and fragrant side you never find in the juice alone.