Lamb Tartare

Name: Lamb Tartare
Ingredients: 1 rack American lamb (about 12 ounces); 1 Tbsp. capers, drained, chopped; 1 Tbsp. chopped fresh mint; 2 tsp. (or more) finely chopped preserved lemon peel; 2 tsp. finely chopped shallot; Flaky sea salt (such as Maldon or Jacobsen); Freshly ground black pepper; 2 large egg yolks; Olive oil (for serving); ½ lemon; Thinly sliced country-style bread, toasted (for serving)