"Create a clear, detailed recipe for Lemon Citrumel (Lemondrop Mead), a 1-gallon semi-sweet sparkling citrus mead with a bright, tangy, and refreshing honey lemonade flavor. Include primary ingredients (1.25 lb orange blossom honey, zest and juice of 1/2 lemon, 1 g wine tannin, spring water to 1 gallon), secondary ingredients (6 oz lemon juice, zest of 1 lemon, 4 oz erythritol), yeast and nutrients (Lalvin K1-V1116 yeast, 3 g Fermaid O at 24 hours), and step-by-step instructions for primary fermentation, secondary fermentation, clearing, bottling, and carbonation. Also include recipe insights, serving suggestions, and potential variations. Use imperial units."