HelloFresh, the German meal kit company, said its first quarter Earnings Before Interest, Taxes, Depreciation and Amortization (EBITDA) plunged by 74.6%, but it delivered its highest quarterly revenue of €2.07 billion ($2.2 billion) on a big increase in average orders. The earnings, reported on Thursday, showed its first-quarter adjusted EBITDA at €16.8 million, versus last year’s €66.1 million. Adjusted EBITDA margin was 0.8%, down 2.5 percentage points from 3.3% last year. In the quarter, HelloFresh delivered its highest ever quarterly revenue of €2.07 billion, up 2.9% from last year’s €2.02…