NOVELTY - Generating batches of biodiesel by transesterification of vegetable oil feedstock with methanol using a potassium hydroxide or sodium hydroxide catalyst, involves: (a) mixing a predetermined proportion of granular potassium hydroxide or sodium hydroxide into the methanol in a methanol holding tank while concurrently heating the vegetable oil feedstock to an elevated temperature in a separate feedstock tank; (b) transferring the resultant methanol/hydroxide mixture to the vegetable oil feedstock in the feedstock tank; and (c) stirring the feedstock/methanol mixture.    USE - The method is useful for generating batches of biodiesel by transesterification of vegetable oil feedstock with methanol using a potassium hydroxide or sodium hydroxide catalyst (claimed).    ADVANTAGE - The process is particularly suitable for domestic and small scale operation, so that each user of biodiesel fuel can generate their own supply. A fully automatic biodiesel processor is provided for which no producer (user) input is required after the process start button has been pressed.    DETAILED DESCRIPTION - Generating batches of biodiesel by transesterification of vegetable oil feedstock with methanol using a potassium hydroxide or sodium hydroxide catalyst, involves: (a) mixing a predetermined proportion of granular potassium hydroxide or sodium hydroxide into the methanol in a methanol holding tank while concurrently heating the vegetable oil feedstock to an elevated temperature in a separate feedstock tank; where the methanol holding tank is associated with a feeder compartment located above the methanol tank and adapted to discharge dry potassium hydroxide or dry sodium hydroxide into liquid methanol by a rotary drive urging the potassium hydroxide or sodium hydroxide to drop into the methanol; (b) transferring the resultant methanol/hydroxide mixture to the vegetable oil feedstock in the feedstock tank; (c) stirring the feedstock/methanol mixture for a predetermined time and then shutting off the stirring circulation while completing the transesterification reaction in the feedstock tank; (d) separating glycerol by-product by gravity drainage into c separate glycerol storage tank; (e) evaporating off excess methanol from the biodiesel product and collecting the methanol vapor by condensation for return to the methanol holding tank; and (f) dispensing biodiesel product by user-activated dispensing nozzle, where the biodiesel product passes through a dry wash intermediate the feedstock tank and the dispensing nozzle. An INDEPENDENT CLAIM is included for a transportable, automatic generator of biodiesel by way of a transesterification reaction including: (a) at least three tanks which, when in use, contain: vegetable oil feedstock; methanol; and glycerol by-product, respectively; (b) a feeder compartment associated with the methanol tank and adapted to discharge dry potassium hydroxide or dry sodium hydroxide into liquid methanol, where the feeder compartment is located above the methanol tank and a rotary drive urges the potassium hydroxide or sodium hydroxide to drop into the methanol; and (c) a user-activated nozzle dispensing biodiesel product drawn from the feedstock tank and associated with a dry wash intermediate the feedstock tank and the dispensing nozzle, where the transesterification reaction occurs in the feedstock tank; or biodiesel generator adapted to operate in accordance with the method above.