Whip the cream until stiff. Mix vanilla pulp, lemon zest, icing sugar and ricotta. Fold in the cream. Wash the strawberries, dab dry and, except for 2 pieces, clean and slice.
Cut the remaining 2 strawberries in half. Coarsely chop 6 sponge fingers. Spread the crumbs in 4 glasses. Sprinkle each with 1-2 tablespoons of eggnog. Layer strawberries at the edge of the glass. Put cream in the middle. Decorate with 1 sponge finger and half a strawberry.