@@ -5,0 +6,3 @@
+</k_ele>
+<k_ele>
+<keb>総菜店</keb>

惣菜店	22593	84.1%
総菜店	4282	15.9%

Japanese WWW pages confirm the "prepared food" meaning. It's a bit 米語 calling them delicatessens.

@@ -13,2 +12,0 @@
-<gloss>delicatessen</gloss>
-<gloss>deli</gloss>

惣菜店	22593
総菜屋	14714

wiki: Traditionally, a delicatessen or "deli" is a retail establishment that sells a selection of fine, exotic, or foreign prepared foods. ... More recently, many larger retail stores like supermarkets have "deli" sections.
OL: delicatessen: a shop selling cooked meats, cheeses, and unusual or foreign prepared foods.
MW: deli: a store where ready-to-eat food products (such as cooked meats and prepared salads) are sold
cambridge: delicatessen: a small shop that sells high-quality foods, such as types of cheese and cold cooked meat, often from other countries, and, especially in the United States, sandwiches made using these foods /
a counter in a supermarket where you can get different types of cheese, cold cooked meat, prepared salads, etc. :

google images

I don't think "delicatessen"/"deli" should lead here because in the narrow sense, it's pretty off.
総菜屋 should be aligned

@@ -11,0 +12 @@
+<gloss>shop selling prepared food</gloss>