The ornamental design for a cookingappliance with a burner grate, as shown and described.
FIG. 1 is a front perspective view of the cooking appliance with a burner grate according to the design;
FIG. 2 is a front perspective view of the cooking appliance with a burner grate shown in FIG. 1 with unclaimed portions of the cooking appliance and additional burner grates that are unclaimed in FIG. 1 being removed;
FIG. 3 is a top plan view of the cooking appliance with a burner grate of FIG. 2;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a front elevation view thereof;
FIG. 6 is a back elevation view thereof;
FIG. 7 is a right side elevation view thereof; and,
FIG. 8 is a left side elevation view thereof.
The broken line showing of various features is for the purpose of illustrating unclaimed portions of the cooking appliance with a burner grate and forms no part of the claimed design.