Mousse de Jambon — Cold Ham Mousse

Ingredients

• 500 g cooked ham (jambon blanc or York-style), lean-to-fat ratio approximately 85:15, passed twice through fine die of meat grinder
• 250 ml velouté, reduced, warm
• 10–12 g sheet gelatin, 180 bloom, bloomed in cold water
• 300 ml heavy cream, minimum 35% butterfat, whipped to soft peaks only
• To serve
• 1 quantity aspic, prepared, for mirror
• 1 quantity cornichons
• 1 quantity Dijon mustard
• 1 quantity brioche, sliced and toasted

Method

1. 1
   Pass the twice-ground ham through the fine die of a meat grinder, then transfer to a food processor. Add the warm reduced velouté and process until the mixture is a completely smooth purée with no discernible fibers. For an exceptionally silky result, pass the purée through a fine-mesh tamis. The test: a small quantity pressed between finger and thumb should feel entirely homogeneous, with no fibrous resistance.
2. 2
   Bloom the sheet gelatin in cold water until fully softened. Squeeze out excess water, then dissolve the gelatin and incorporate it into the ham base while the base registers 35–38°C. Stir until no gelatin remains visible. If desired, add 1–2 tablespoons of port or Madeira at this stage for aromatic complexity. The test: the mixture should appear glossy and fully homogeneous, with no gelatin strands or lumps.
3. 3
   This is where the dish lives or dies. Set the bowl over an ice bath and stir the base gently and continuously until it cools to 18–20°C — cool enough to accept the cream without deflating it, yet warm enough to prevent premature gelatin setting. Test a small sample on a chilled plate; it should just begin to hold a light set at the edges without firming through. Only at this precise temperature window should the cream be folded in.
4. 4
   Whip the heavy cream to soft peaks only — the cream should hold a gentle, drooping shape when the whisk is lifted. Stiff peaks will produce a dense, grainy mousse. Fold the cream into the cooled ham base in three additions, using a large balloon whisk or spatula, working with deliberate strokes that preserve maximum aeration. The test: the finished mousse should appear pale, uniform in color, and airy, with no streaks of unincorporated cream.
5. 5
   Line dariole moulds, ramekins, or a terrine form with plastic film, leaving a 5 cm overhang on all sides. Pipe or spoon the mousse into the prepared moulds, smoothing the surface. Refrigerate at 2–4°C for a minimum of 4 hours. The test: the mousse should be firm to a light press at the surface and have fully withdrawn from the edges of the mould.
6. 6
   Unmould onto a mirror of prepared aspic. The mousse should hold its shape firmly and cleanly without slumping, while yielding a smooth, airy texture on the palate that dissolves without graininess. Serve with cornichons, Dijon mustard, and brioche toasts.