Preheat oven to 325°. Cut each egg into 6 wedges. Unroll crescent dough and separate into 8 triangles; cut each triangle lengthwise into 3 thin triangles. Place 1 sausage piece on the wide end of each smaller triangle; top with an egg wedge and a cherry tomato half. Roll up tightly; place, point-side down, on a parchment-lined baking sheet. Brush with beaten egg; sprinkle with poppy seeds. Bake until golden brown on bottom and heated through, 14-16 minutes.